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Brake Actuator: Inspection

  1. CHECK BRAKE ACTUATOR ASSEMBLY 
    1. Measure the resistance according to the value (s) in the table below.

      HINT:

      Perform the check with the actuator at the lowest temperature possible.

      Standard resistance 

      Fig 1: Identifying Brake Actuator Assembly Connector
      G04949720Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      20 (SMC1)-19 (BS1) Always 15.3 to 25.0 Ω
      6 (SMC2) - 7 (BS2)
      8 (SLAFR+) - 5 (SLAFR-) 3.6 to 6.0 Ω
      22 (SLRFR+) - 21 (SLRFR-)
      13 (SLAFL+)-14 (SLAFL-)
      27 (SLRFL+) - 28 (SLRFL-)
      12 (SLARR+) -11 (SLARR-)
      10 (SLARL+)-9 (SLARL-)
      26 (SLRRR+) - 25 (SLRRR-) 4.4 to 7.0 Ω
      24 (SLRRL+) - 23 (SLRRL-)

      If the result is not as specified, replace the brake actuator.

  2. CHECK BRAKE ACCUMULATOR PUMP 
      Fig 2: Identifying Brake Accumulator Pump Connector
      G04949721Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      A2 (BM1)-A4 (GND1) Always 10 kΩ or higher
      B2 (BM2)-A4 (GND1)
      A2 (BM1)-B2 (BM2) Below 1 Ω
      A4 (GND1)-B1 (GND2)
      A2 (BM1)-A1 (MTT) 950 to 1050 Ω
      B2 (BM2) - A1 (MTT)

      If the result is not as specified, replace the brake accumulator pump.

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